Substances are chemically combined and cannot be separated by normal physical means. Mixtures, however, are simply physically combined and can be separated into their component parts.
Answer:
Explanation:
Below are few snaps for explanation.
# of atoms per mol = Avogadro’s # (6.022 x 10^23)
Number of mols = mass of substance / molar mass
73 g / 40.08 g = 1.8 mols of Ca in 73 grams
1.8 mols x avagadro’s # = 1.1 x 10^24 atoms in 73 grams of Ca
Answer:
ions have are charged and molecules are not
Explanation:
.71 because it is negative you move the decimal point to the left one time